| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. E Romani vs C Papapostolou |
| 0-1 | 45 | 1970 | Siegen Olympiad Final-C | A41 Queen's Pawn Game (with ...d6) |
| 52. C Papapostolou vs D Ghizdavu |
| 0-1 | 44 | 1971 | Athens Balkaniad | B06 Robatsch |
| 53. Velimirovic vs C Papapostolou |
| 1-0 | 42 | 1971 | 5th European Team Championship qual-6 | B03 Alekhine's Defense |
| 54. C Pekun vs C Papapostolou |
| 0-1 | 42 | 1971 | 5th European Team Championship qual-6 | B32 Sicilian |
| 55. C Papapostolou vs Csom |
| 0-1 | 40 | 1971 | 5th European Team Championship qual-6 | B57 Sicilian |
| 56. P Sargos vs C Papapostolou |
| 0-1 | 33 | 1984 | Bratto Open | C42 Petrov Defense |
| 57. C Papapostolou vs S Wagman |
| 0-1 | 26 | 1984 | Bratto Open | B70 Sicilian, Dragon Variation |
| 58. D Caruso vs C Papapostolou |
| ½-½ | 58 | 1984 | Bratto Open | C42 Petrov Defense |
| 59. C Papapostolou vs P Battaggia |
| 1-0 | 20 | 1984 | Bratto Open | B90 Sicilian, Najdorf |
| 60. F Agnelli vs C Papapostolou |
| 0-1 | 43 | 1984 | Bratto Open | C26 Vienna |
| 61. C Papapostolou vs J Dierich |
| 1-0 | 44 | 1984 | Bratto Open | B45 Sicilian, Taimanov |
| 62. G Scholz Solis vs C Papapostolou |
| 1-0 | 34 | 1984 | Bratto Open | D38 Queen's Gambit Declined, Ragozin Variation |
| 63. C Papapostolou vs M Sibilio |
| 1-0 | 64 | 1984 | Bratto Open | B06 Robatsch |
| 64. C Papapostolou vs Janosevic |
| 0-1 | 36 | 1984 | Bratto Open | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 65. C Papapostolou vs C Kamp |
| ½-½ | 85 | 1988 | Dortmund Open | C05 French, Tarrasch |
| 66. C Papapostolou vs J Nun |
| 0-1 | 33 | 1988 | Dortmund Open | B10 Caro-Kann |
| 67. C Papapostolou vs M Breutigam |
| 0-1 | 50 | 1988 | Liechtenstein Open | C05 French, Tarrasch |
| 68. C Papapostolou vs H Kugler |
| 1-0 | 24 | 1990 | Baden-Baden Open | C00 French Defense |
| 69. U Waagener vs C Papapostolou |
| 1-0 | 26 | 1991 | Porz op 27th | C45 Scotch Game |
| 70. F Artz vs C Papapostolou |
| 0-1 | 33 | 1991 | Baden-Baden Open | A07 King's Indian Attack |
| 71. K Patzl vs C Papapostolou |
 | 1-0 | 30 | 1992 | Bad Woerishofen Seniors op 08th | C58 Two Knights |
| 72. O Kozlov vs C Papapostolou |
| 1-0 | 29 | 1998 | Ceske Budejovice Open | A06 Reti Opening |
| 73. V Piza vs C Papapostolou |
| 1-0 | 38 | 1998 | Plzen op-C U18 | E88 King's Indian, Samisch, Orthodox, 7.d5 c6 |
| 74. C Papapostolou vs Vasiukov |
| 0-1 | 34 | 2001 | World Seniors | B32 Sicilian |
| 75. B Sandmann vs C Papapostolou |
| ½-½ | 42 | 2003 | Wuerttemberg-ch Seniors 15th | A04 Reti Opening |
Kibitzing
